Memorandum clock



. (No Model.) 3 Sheets-Sheet 1.

J. DAVIDSON MEMORANDUM CLOCK. No; 466,712. Patented Jan. 5,1892;

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J. DAVIDSON.

MEMORANDUM CLOCK.

No. 466,712. Patented Jan. 5, 1892.

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s t e e h S m e e h S 3 L N S M U m A A R M B M. a d 0 M O W No. 466,712. Patented Jan. 5, 1892.

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UNITED STATES PATENT OFFICE.

.IOI-IN DAVIDSON, OF WICK, SCOTLAND.

MEMORANDUM-CLOCK.

SPECIFICATION forming part of Letters Patent No. 466,712, dated January 5, 1892. Application filed August 5, 1891, Serial No. 401,790. (N0 model.) Patented in England January 14, 1891, No. 706.

T0 at whom it may concern.-

Be it known that I, JOHN DAVIDSON, watchmaker, of Wick, in the county of Caithness, North Britain, have invented an Automatic Memorandum-Clock, (for which I have obtained Letters Patent of Great Britain, dated January 14, 1891, and numbered 706,) of which the following is a specification.

This invention relates to an automatic memorandum-clock which produces or gives the following results: Supposing a person wishes to be reminded at any time during the twentyfour hours to fulfill a promise to do a-certain thing or to keep any kind of engagement, the nature of said engagement would be written on a slip or tablet of ivory, celluloid,or other material, which is then placed in a slot in a circular drum and from which the said slip drops at the proper time into a box and rings a bell, thus calling the attention of any one within hearing of the bell.

In carrying out my said invention I employ a circular drum or barrel, which may be made of any suitable metal or material and having a number of slots or holes which represent the hours and the quarters or other parts of the hours. The said drum or barrel revolves within a suitable stationary plate or casing, which has one slot or hole immediately below and in the same circle as the drums slots or holes, so that on a slip or tablet being placed in the said drums slot representing the hour or part thereof desired its end rests on the inside surface of the stationary plate or casing until the drum, which may be mounted direct onto any ordinary clocks hour-whcel spindle or driven by same through the medium of a train of wheels, is so caused to rotate and at the proper time allowed to drop down through the slot in stationary plate or easing into a box (below the said slot and in view of any one present) having a spring-bottom, which on being depressed by the weight of the falling slip or tablet and so frees the one end of a bent rod or wire connected to the hammer-head, arm, or arbor in such a manner as to cause a bell to be rung by means of the ordinary alarm-work or other clock work until the bottom of said box springs up again and so locks the said rod or wire. The said revolving drum or barrel and stationary plate or casing may be mounted on top or bottom of any clock, in which case the Works or movement would be placed horizontally in lieu of vertically if mounted direct to the hour wheel and spindle, though by connecting the drum or barrel by a train of gearing to the hour wheel and spindle I may mount the said drum either on top, bottom, sides, or front, an example of one method of which I will now proceed to describe with reference to the accompanying drawings.

Throughout the drawings the same reference-letters denote the same parts.

Figure 1, Sheet 1, is a front view; Fig. 2, Sheet 2. a side view shown partly in section, and Fig. 3, Sheet 3, a part plan of my automatic memorandu m-clock as constructed with the revolving drum or barrel on top and connected to the clocks center-wheel arbor by a train of gearing. Fig. 1, Sheet 3, shows the memorandum slip or tablet.

Referring to the said drawings, I employ an ordinary clock A, (in this case an alarmclock having its bell B mounted underneath,) to the top of which I secure a metal or other material plate or casing O by means of bolts or rods 0. Inside the said casingI mount the revolving drum or barrel D, having slots at arranged around its center, each of which denotes the hours or parts thereof. The example shown denotes the hours and quarters, the references d, Fig. 3, to which are arranged around their outer ends, as shown that is, by securing a printed slip of paper or other material to top of said drumthough I may use any other suitable means for same object, and, if desired, I may form the said drum D with a tablet-receptacle E, so as to hold the said tablets when not in use, there being also provided a removable cover 0 for the said casing 0, and immediately under the opening or slot F of which I mount by screws or other- .wise an open metal or other material box G,

having a spring-bottom g and guide-rail g, the said spring-bottom looking or unlocking the outer extremity of the rod or Wire H, the inner end of which is connected to the hammerhead, arm, or arbor in such a manner as to ring the bell B when the spring-bottom g is depressed by the falling tablet J. (Shown more particularly in Fig. 4, Sheet In order to drive or rotate the said drumD relative to the rotation of the clocks hands through the ICO . of the movements center wheel-spindle 7t, and

into which'another bevel or miter wheel K gears, the latter being secured to the lower end of a vertical spindle Z, having a spur or toothed pinion Z into which works a loose spur or toothed wheel Z which again works into a loose pinion Z which gears into another loose wheel Z having a pinion Z attached, the latter of which works into the drums wheel Z, the whole of which may be supported by a frame F, the said drum being connected to said wheel Z by any suitable means, though preferably as shown at 00, Fig. 2, thus enabling the drum and hands to be moved simultaneously whether by the clock-work or by the hand-adjusting knob y. The whole arrangement being such that, supposing a person has to meet another at two oclock, he fills up a slip or tablet J, Fig. 4, and then he places it in the slot of the drum corresponding to two, and on the hands of the clock coming round to two the drum also comes with tablet right above the stationary slot F, and so allows the tablet J to fall through into the box G, and so ring the bell 13 either once, twice, or other number, or until the tablet has been removed from the box, as desired, by so arranging the weight of the tablet and the power of the spring underneath the bottom of the box G.

In some cases Where the drum revolves in a horizontal plane and is mounted direct on the hour-wheel and spindle I may dispense with the ordinary face or dial and provide a printed or other strip around the periphery of the drum, having the hours and parts marked thereon, the time being indicated by means of a fixed pointer on stationary plate or casing and which may be seen through a suitable opening in said casing, and in cases where the drum revolves in a vertical plane that is, if mounted on either side of the clock or in front of the cl0ck-I form the said drum with slots or holes around its periphery, as well as in its sides, so as to enable the slips or tablets to fall down through the stationary slot which is formed in stationary casings side, and when the drum is mounted in front of the clock I may mount it in front of the ordinary dial and around same and so form its center of pierced or fret work, so as to enable the dial being seen, and I may provide any suitable cover or lid for said drums stationary casing.

As a modification of my bell-actuating arrangement I may provide a hammer arm or rod fixed with a pivot or joint and attached to the said spring-bottom g of the box G, so that on the tablet depressing the spring-bottom the hammer-head would strike a bell; or I can cause the weight of the tablet to push down the spring-bottom of the box and so.

create contact in connection with an electric bell, or otherwise create contact when the tablet falls into the box in such a manner as to ring either momentarily or continuously until the tablet is removed from the box, and in order to enable the said automatic memorandum clock or other clock to be used as an ordinary call-bell I may connect a short handle or push-button M, which on being depressed by the finger or hand will cause the bell to be rung.

I claim" 1. In a memorandum automatic clock, the combination of a drum provided with a series of slots for the passage of a tablet, clock mechanism adapted to operate said drum, a box or receptacle to receive the said tablet from said drum, and an alarm arranged to be given while the tabletremains in said box or receptacle, as set forth.

2. In a memorandum automatic clock, the combination of a drum provided with a series of slots for the passage of a tablet, clock mechanism connected with and adapted to operate said drum, a box or receptacle G to receive the tablet from said drum and having a springbottom g, a rod or wire H, and a call-bell, all arranged and operating substantially as and for the purposes hereinbefore set forth.

3. In a memorandum-clock, the combination of a drum having a series of slots for the passage of a tablet, a frame supporting said drum, a train of gearing located in the said frame, bevel-wheels operated by a spindle connecting with the said train of gearing, a receptacle having a spring-bottom to receive 'the tablet when dropped from said drum, a guide-rail g, a rod or wire connected to the hammer-head, and a call-bell, all arranged 

